When Sherri Larsen casts her vote for President, she will be thinking of her first-grade son. A divorced mother of three on a pinched budget, Larsen could not afford preschool tuition. But thanks to Georgia's pioneering universal pre-K program, which guarantees each of the state's four-year-olds a year of school, she didn't pay a cent. Her son entered kindergarten fully versed in his ABCs and is now reading a year ahead of pace. Says Larsen: "I just can't believe this program isn't available in other states."
Asked early in the election which single program would distinguish him from any other candidate,...